Crystal-Water-Free Potassium Vanadium Bronze (K0.5V2O5) as a Cathode Material for Ca-Ion Batteries

Meladia E. Purbarani; Jooeun Hyoung; Seung Tae Hong

doi:10.1021/acsaem.1c01158

Crystal-Water-Free Potassium Vanadium Bronze (K_0.5V₂O₅) as a Cathode Material for Ca-Ion Batteries

Meladia E. Purbarani
, Jooeun Hyoung
, Seung Tae Hong

Department of Energy and Science and Engineering

Daegu Gyeongbuk Institute of Science and Technology

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

The research to discover a suitable cathode material for calcium-ion batteries (CIBs) remains challenging, despite their potential advantages of high energy density and cost-effectiveness. Herein, we report K0.5V2O5 as a cathode material for CIBs. During the initial charging of the electrode, potassium ions were replaced with 0.12 Ca. The calcium-exchanged electrode exhibited a reversible discharge capacity of â 100 mAh g-1 at 0.1 C rate at room temperature with an average voltage of â 3.0 V (vs Ca/Ca2+). The reversible capacity is higher than any reported cathode materials without crystal water, demonstrating the feasibility of further development of high-capacity crystal-water-free CIB cathode materials.

Original language	English
Pages (from-to)	7487-7491
Number of pages	5
Journal	ACS Applied Energy Materials
Volume	4
Issue number	8
DOIs	https://doi.org/10.1021/acsaem.1c01158
State	Published - 23 Aug 2021

Bibliographical note

Publisher Copyright:
©

Keywords

calcium vanadium bronze
calcium-ion batteries
cathode material
intercalation
potassium vanadium bronze

Access to Document

10.1021/acsaem.1c01158

Cite this

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title = "Crystal-Water-Free Potassium Vanadium Bronze (K0.5V2O5) as a Cathode Material for Ca-Ion Batteries",

abstract = "The research to discover a suitable cathode material for calcium-ion batteries (CIBs) remains challenging, despite their potential advantages of high energy density and cost-effectiveness. Herein, we report K0.5V2O5 as a cathode material for CIBs. During the initial charging of the electrode, potassium ions were replaced with 0.12 Ca. The calcium-exchanged electrode exhibited a reversible discharge capacity of {\^a} 100 mAh g-1 at 0.1 C rate at room temperature with an average voltage of {\^a} 3.0 V (vs Ca/Ca2+). The reversible capacity is higher than any reported cathode materials without crystal water, demonstrating the feasibility of further development of high-capacity crystal-water-free CIB cathode materials.",

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AU - Hyoung, Jooeun

AU - Hong, Seung Tae

N1 - Publisher Copyright: ©

PY - 2021/8/23

Y1 - 2021/8/23

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AB - The research to discover a suitable cathode material for calcium-ion batteries (CIBs) remains challenging, despite their potential advantages of high energy density and cost-effectiveness. Herein, we report K0.5V2O5 as a cathode material for CIBs. During the initial charging of the electrode, potassium ions were replaced with 0.12 Ca. The calcium-exchanged electrode exhibited a reversible discharge capacity of â 100 mAh g-1 at 0.1 C rate at room temperature with an average voltage of â 3.0 V (vs Ca/Ca2+). The reversible capacity is higher than any reported cathode materials without crystal water, demonstrating the feasibility of further development of high-capacity crystal-water-free CIB cathode materials.

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KW - cathode material

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